EP0063506A1 - Schutzvorrichtung für freiliegende optische Fasern am Ende eines Kabelelements, Kabelelement mit einer derartigen Vorrichtung und Anwendung eines solchen Kabelelements - Google Patents

Schutzvorrichtung für freiliegende optische Fasern am Ende eines Kabelelements, Kabelelement mit einer derartigen Vorrichtung und Anwendung eines solchen Kabelelements Download PDF

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Publication number
EP0063506A1
EP0063506A1 EP82400509A EP82400509A EP0063506A1 EP 0063506 A1 EP0063506 A1 EP 0063506A1 EP 82400509 A EP82400509 A EP 82400509A EP 82400509 A EP82400509 A EP 82400509A EP 0063506 A1 EP0063506 A1 EP 0063506A1
Authority
EP
European Patent Office
Prior art keywords
sleeve
cable element
tooth
cable
fiber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP82400509A
Other languages
English (en)
French (fr)
Other versions
EP0063506B1 (de
Inventor
André Bouvard
Jean-Pierre Hulin
Patrick Le Maitre
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lignes Telegraphiques et Telephoniques LTT SA
Original Assignee
Lignes Telegraphiques et Telephoniques LTT SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from FR8106771A external-priority patent/FR2503384A1/fr
Priority claimed from FR8110453A external-priority patent/FR2506956B1/fr
Application filed by Lignes Telegraphiques et Telephoniques LTT SA filed Critical Lignes Telegraphiques et Telephoniques LTT SA
Publication of EP0063506A1 publication Critical patent/EP0063506A1/de
Application granted granted Critical
Publication of EP0063506B1 publication Critical patent/EP0063506B1/de
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4439—Auxiliary devices
    • G02B6/4471—Terminating devices ; Cable clamps
    • G02B6/4472—Manifolds
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3873—Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls
    • G02B6/3874—Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls using tubes, sleeves to align ferrules
    • G02B6/3878—Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls using tubes, sleeves to align ferrules comprising a plurality of ferrules, branching and break-out means
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4401—Optical cables
    • G02B6/4407—Optical cables with internal fluted support member
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4439—Auxiliary devices
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4439—Auxiliary devices
    • G02B6/4471—Terminating devices ; Cable clamps
    • G02B6/4476—Terminating devices ; Cable clamps with heat-shrinkable elements

Definitions

  • the present invention relates generally to optical fiber transmission systems, and more particularly relates to a device for protecting optical fibers released at the end of a cable element and intended to be connected to electronic equipment, such as for example repeaters.
  • a fiber optic transmission cable comprises, under a set of protective envelopes, a plurality of cable elements of a determined type of structure.
  • One of the known structures of fiber optic cable element consists of a dielectric cylindrical support reinforced along its axis and hollowed out with grooves, either longitudinal, or helical with simple or alternating pitch, regularly arranged around its periphery, and in each of which is housed an optical fiber.
  • Such a cable structure is described in particular in the French patent application filed on behalf of the Applicant on February 18, 1977 and published under No. 2,380,326, concerning: "Cable element incorporating optical fibers".
  • each frame consists of at least one cable head, produced in the form of a chassis, in which the optical fibers of the same cable element are received, and of a compartment of electronic equipment, such as particular of repeaters intended to amplify the optical signals transmitted by each optical fiber.
  • the operations of the method described above consisting in stripping each cable element over a predetermined length and in mounting a connector at each end of the fiber have disadvantages.
  • the released optical fibers appear bare in the cable head, which can cause a risk of breakage of said fibers; therefore, the bare fibers are difficult to handle by an operator.
  • mounting the connectors at the ends of the fibers is a delicate operation and relatively long to perform.
  • the volume occupied by the connectors arranged in alignment in the cable head is relatively large.
  • the object of the present invention is to remedy these drawbacks by proposing a device ensuring protection of the optical fibers at the outlet of the same cable element once stripped, which is entirely satisfactory, of a simple structure, inexpensive, guaranteed. good mechanical strength of the fibers, thereby eliminating any risk of them breaking.
  • the subject of the invention is a device for protecting at least one optical fiber released at the end of a cable element, characterized in that it comprises a piece forming a sleeve in which is intended to be fitted at the end of the cable element, and at least one flexible tube-shaped sheath, mounted integrally in the longitudinal extension of the sleeve so as to extend outwards, and in which the optical fiber is positioned, the sheath thus protecting the fiber released from the cable element.
  • the sleeve has on its inner periphery at least one radial tooth extending substantially over the entire length of the sleeve, and the tooth has at least one longitudinal orifice aligned along the axis of the sheath, and through which the optical fiber is introduced, so that the fiber slides longitudinally in the orifice of the tooth and is positioned in the sheath, the tooth thus making it possible to guide the fiber for its passage through the sleeve.
  • the invention also relates to a cable element provided with the protection device according to the invention, and to the use of such a cable element.
  • This use is characterized by the fact that the protection device is mounted in a cable head installed in a frame and intended to allow the connection of optical fibers to electronic equipment arranged in the frame.
  • an optical fiber cable element intended to be connected or connected to electronic equipment arranged in a frame.
  • This frame is installed in a main or secondary station of a fiber optic transmission system.
  • the cable element 1 comprises a central reinforcement or core 2 intended to stiffen the cable and absorb stresses longitudinal, around which is disposed a cylindrical dielectric support or rod 3 hollowed out with grooves 4, longitudinal or helical with single or alternating pitch, with a profile, for example in the form of a V, and distributed uniformly over the external surface of the support 3.
  • a l inside each groove 4 is housed an optical fiber 6, and the protective casing of the cable element 1 is shown at 7.
  • the following operations consist in stripping, at the level of the cable head, the end of cable element 1 over a predetermined length, spreading the fibers 6 thus released outward, and cutting perpendicularly to its axis l ' core 2-support 3 assembly stripped of its fibers.
  • the device 10 for protecting the optical fibers comprises a heat-shrinkable cylindrical sleeve 11, of axis XX ′, of length 1, made for example of an elastomeric material, and in which is intended to be fitted the end of the support of the cable element 1.
  • the sleeve 11 comprises, on its end face 13, a set of flexible sheaths 15 in the form of tubes of deter length mined L, and extending outward.
  • the number of sheaths 15 is equal to that of the optical fibers 6, so that each fiber is positioned, substantially over its entire length, in the corresponding sheath 15.
  • each sheath 15 mechanically protects the fiber 6 released at the end of cable element 1.
  • the protective sheaths 15 are distributed around the periphery of the end face 13 of the sleeve 11, at the same angular spacing as the grooves of the support 3 (FIG. 1), thus allowing the optical fibers 6 to slide longitudinally in the sheaths. corresponding 15.
  • the sheaths 15 come from molding with the sleeve 11, so that the sleeve and the protective sheaths constitute a unitary assembly which is substantially in the form of a "glove".
  • the sleeve 11 may also include wires. forming reinforcements, without departing from the scope of the invention.
  • the heat-shrinkable sleeve 11 is produced for example in two parts 11a and 11b, and comprises on its outlet end face 13, a set of parts forming hollow studs 18 projecting longitudinally from said sleeve.
  • the pins 18 are distributed on the periphery of the end face 13 of the sleeve according to the same angular spacing as the grooves 4 of the support 3 ( Figure 1).
  • the pins 18 come from molding with the sleeve 11, and are made for example of an elastomeric material.
  • each sheath 15 is attached to the studs 18, as indicated by the arrow A in FIG. 3, so that the end of each sheath 15 comes to be positioned rigidly around the corresponding stud 18.
  • the heat-shrinkable sleeve 11 comprises on its inner periphery 20, a set of parts forming radial teeth 22 extending substantially over the entire length 1 of the sleeve .
  • the teeth 22, in number equal to that of the grooves 4 of the support 3 of the cable element, are distributed in the sleeve 11 according to the same angular spacing as the grooves 4 of the support 3.
  • the teeth 22 have in section transverse a shape identical to that of the grooves 4, that is to say a V in the example chosen, and are of dimensions substantially smaller than those of the grooves 4, so that each tooth 22 will internally match the shape of each groove 4 during its insertion into said groove, as will be seen later.
  • the teeth 22 come from molding with the sleeve 11 and are produced for example from an elastomeric material.
  • each tooth 22 is pierced with a longitudinal orifice 24 aligned with the corresponding hollow stud 18 ( Figure 3), and arranged along the axis of each fiber 6 carried by the support 3 of the cable element.
  • the diameter of each orifice 24 is equal to that of each stud 18, and is slightly greater than that of each fiber 6.
  • the optical fibers 6 in the protective sheaths 15 To achieve the positioning of the optical fibers 6 in the protective sheaths 15, one begins by introducing said fibers into the corresponding holes 24 ( Figure 4), so that by translation of the sleeve 11, the optical fibers slide longitudinally in said holes. Thus, the teeth 22 provide guidance of the fibers for their passage through the sleeve. Then, at the exit from the orifices 24, the fibers pass through the corresponding pins 18 (FIG. 3) and are positioned longitudinally in the corresponding added sheaths 15. Thus, the sheaths 15 mechanically protect the fibers released at the end of the cable element 1.
  • the following operation consists in mounting the protection device 10 on the support of the cable element.
  • the teeth 22 are inserted by sliding in the corresponding grooves 4 of said support, internally matching the shape of said grooves.
  • the optical fibers carried by the support 3 lie flat in the corresponding orifices 24, thus making it possible to obtain perfectly linear positioning of said fibers.
  • the heat-shrinkable sleeve 11 is heated to ensure its rigid attachment to the cable element, the teeth inserted in the grooves of the support ensuring rigorous blocking of the sleeve on the support, which makes it possible to avoid any rotation of said sleeve.
  • the latter advantageously comprises a longitudinal extension 26 shown in dotted lines in FIG. 3, bearing on the casing 7 of the element of cable.
  • connection of the optical fibers 6 of the same cable element 1 to powered electronic equipment is completed by installing the protection device 10 in the cable head, and by connecting the sheathed optical fibers to said equipment, either directly by soldering, either by means of connectors mounted at the ends of said sheathed fibers.
  • the protection device according to the invention can be used to perform a so-called transplanting operation of one of the fibers carried by a cable element.
  • the protection device consists of a sleeve extending by a single sheath in which the optical fiber is positioned once released from its support. Therefore, the fiber transplanted and protected by its sheath can be connected to any appropriate electronic equipment.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Mechanical Coupling Of Light Guides (AREA)
EP82400509A 1981-04-03 1982-03-19 Schutzvorrichtung für freiliegende optische Fasern am Ende eines Kabelelements, Kabelelement mit einer derartigen Vorrichtung und Anwendung eines solchen Kabelelements Expired EP0063506B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR8106771A FR2503384A1 (fr) 1981-04-03 1981-04-03 Dispositif de protection de fibres optiques degagees a l'extremite d'un element de cable, element de cable muni de ce dispositif, et utilisation d'un tel element de cable
FR8106771 1981-04-03
FR8110453A FR2506956B1 (fr) 1981-05-26 1981-05-26 Dispositif de protection de fibres optiques degagees a l'extremite d'un support d'element de cable, element de cable equipe de ce dispositif, et utilisation d'un tel element
FR8110453 1981-05-26

Publications (2)

Publication Number Publication Date
EP0063506A1 true EP0063506A1 (de) 1982-10-27
EP0063506B1 EP0063506B1 (de) 1984-08-08

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP82400509A Expired EP0063506B1 (de) 1981-04-03 1982-03-19 Schutzvorrichtung für freiliegende optische Fasern am Ende eines Kabelelements, Kabelelement mit einer derartigen Vorrichtung und Anwendung eines solchen Kabelelements

Country Status (4)

Country Link
US (1) US4697873A (de)
EP (1) EP0063506B1 (de)
CA (1) CA1194353A (de)
DE (1) DE3260519D1 (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0092441A1 (de) * 1982-04-20 1983-10-26 Raychem Pontoise S.A. Fiberoptische Kabel
GB2122378A (en) * 1982-01-22 1984-01-11 Preformed Line Products Co Splice wedge for holding optical fibers
FR2587126A1 (fr) * 1985-09-09 1987-03-13 Lignes Telegraph Telephon Dispositif d'eclatement d'un faisceau de fibres optiques en fibres optiques unitaires
FR2588670A1 (fr) * 1985-10-16 1987-04-17 Lignes Telegraph Telephon Tete d'eclatement d'un cable a fibres optiques
GB2210472A (en) * 1987-09-30 1989-06-07 British Telecomm Optical fibre package termination assembly
US5048918A (en) * 1990-02-07 1991-09-17 Raychem Corporation Optical fiber cable termination
EP0330571B1 (de) * 1988-02-23 1993-06-16 AMPHENOL SOCAPEX Société Anonyme Mechanische Haltevorrichtung für optische Kabel mit freier Struktur
WO1996030987A1 (de) * 1995-03-30 1996-10-03 Klöckner-Moeller Gmbh Detektor für störlichtbögen in schaltanlagen zur verteilung elektrischer energie
US5940547A (en) * 1995-03-30 1999-08-17 Klockner-Moeller Gmbh Optical fiber accidental arc detector for an electric power distribution switching device

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Publication number Priority date Publication date Assignee Title
FR2597616B1 (fr) * 1986-04-17 1988-08-05 Telecommunications Sa Dispositif et procede d'epanouissement de fibres optiques sortant d'un cable a raccorder
FR2598822B1 (fr) * 1986-05-16 1988-08-26 Telecommunications Sa Equipement de repartition et raccordement de fibres optiques.
IT1202607B (it) * 1987-03-02 1989-02-09 Pirelli Cavi Spa Giunto per cavi di telecomunicazione a fibre ottiche
JPH0339911A (ja) * 1989-04-14 1991-02-20 Sumitomo Electric Ind Ltd 多心光ファイバ心線の分岐部
US5013128A (en) * 1990-06-07 1991-05-07 General Dynamics Corporation, Convair Division Fiber optic light guide with improved end-to-end efficiency
AU1325292A (en) * 1991-03-01 1992-10-06 Fibernet Research Pty. Ltd. Fibre separator
JPH04350801A (ja) * 1991-05-29 1992-12-04 Furukawa Electric Co Ltd:The 多心被覆光ファイバの分岐部
DE9316172U1 (de) * 1993-10-22 1993-12-09 Kabelmetal Electro Gmbh, 30179 Hannover Muffe zur Aufnahme von Abzweig- oder Verbindungsstellen von optischen oder elektrischen Kabeln
US5425121A (en) 1994-02-02 1995-06-13 Siecor Corporation Cable assembly for use with opto-electronic equipment enclosures
US5416874A (en) * 1994-07-01 1995-05-16 Siecor Corporation Optical receiver stub fitting
US5473718A (en) * 1994-09-20 1995-12-05 The United States Of America As Represented By The Secretary Of The Navy Fiber optic loose tube buffer to fan-out tube adapter system
ES1046751Y (es) * 2000-07-26 2001-06-16 Telefonica Sa Separador de fibras opticas.
US20050207711A1 (en) * 2004-03-19 2005-09-22 Vo Chanh C Optical termination pedestal
US8798427B2 (en) * 2007-09-05 2014-08-05 Corning Cable Systems Llc Fiber optic terminal assembly
US20090211171A1 (en) * 2008-02-25 2009-08-27 Timothy Frederick Summers Multi-dwelling unit multipurpose signal distribution apparatus
EP2344915A4 (de) * 2008-10-09 2015-01-21 Corning Cable Sys Llc Faseroptischer anschluss mit adaptertafel, die sowohl eingangs- als auch ausgangsfasern von einem optischen teiler unterstützt
US8879882B2 (en) * 2008-10-27 2014-11-04 Corning Cable Systems Llc Variably configurable and modular local convergence point
US9547144B2 (en) 2010-03-16 2017-01-17 Corning Optical Communications LLC Fiber optic distribution network for multiple dwelling units
US8792767B2 (en) 2010-04-16 2014-07-29 Ccs Technology, Inc. Distribution device
CN103109221B (zh) 2010-09-21 2015-11-25 胡贝尔和茹纳股份公司 环境密封的电缆分支组件
US9720197B2 (en) 2010-10-19 2017-08-01 Corning Optical Communications LLC Transition box for multiple dwelling unit fiber optic distribution network
EP2527895B1 (de) * 2011-05-26 2013-12-04 CCS Technology, Inc. Glasfaserverteilungsvorrichtung
US9219546B2 (en) 2011-12-12 2015-12-22 Corning Optical Communications LLC Extremely high frequency (EHF) distributed antenna systems, and related components and methods
US20130183012A1 (en) * 2012-01-13 2013-07-18 Alma Delia Cabanne Lopez Fan-out kit for a furcation system
US10110307B2 (en) 2012-03-02 2018-10-23 Corning Optical Communications LLC Optical network units (ONUs) for high bandwidth connectivity, and related components and methods
US9004778B2 (en) 2012-06-29 2015-04-14 Corning Cable Systems Llc Indexable optical fiber connectors and optical fiber connector arrays
US9049500B2 (en) 2012-08-31 2015-06-02 Corning Cable Systems Llc Fiber optic terminals, systems, and methods for network service management
US8909019B2 (en) 2012-10-11 2014-12-09 Ccs Technology, Inc. System comprising a plurality of distribution devices and distribution device
CN104658677B (zh) * 2015-03-12 2017-07-07 安徽特种电缆集团有限公司 一种耐扭曲耐火电力电缆
CN105427948B (zh) * 2015-10-27 2017-08-08 长飞光纤光缆股份有限公司 骨架式光电复合缆及其制造方法

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FR2256419A1 (de) * 1973-12-26 1975-07-25 Corning Glass Works
GB1448743A (en) * 1973-08-24 1976-09-08 Post Office Optical communications systems
US3987300A (en) * 1975-06-27 1976-10-19 General Dynamics Corporation Integrated array of optical fibers and thin film optical detectors, and method for fabricating the same
US4076379A (en) * 1976-07-26 1978-02-28 United Technologies Corporation Fiber optic connector
US4080045A (en) * 1973-12-26 1978-03-21 Olympus Optical Co., Ltd. Optical fiber bundle with reinforced end portions
GB2049220A (en) * 1979-05-09 1980-12-17 Bunker Ramo Optical fiber terminator and means and method for centering optical fiber
EP0036369A1 (de) * 1980-03-14 1981-09-23 Lignes Telegraphiques Et Telephoniques L.T.T. Verfahren und Vorrichtung zum Verbinden faseroptischer Kabel auf dem Arbeitsplatz

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US4153332A (en) * 1974-07-30 1979-05-08 Industrie Pirelli Societa Per Azioni Sheathed optical fiber element and cable
CA1010275A (en) * 1975-02-03 1977-05-17 Helmut H. Lukas Connectors for optical fibres

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1448743A (en) * 1973-08-24 1976-09-08 Post Office Optical communications systems
FR2256419A1 (de) * 1973-12-26 1975-07-25 Corning Glass Works
US4080045A (en) * 1973-12-26 1978-03-21 Olympus Optical Co., Ltd. Optical fiber bundle with reinforced end portions
US3987300A (en) * 1975-06-27 1976-10-19 General Dynamics Corporation Integrated array of optical fibers and thin film optical detectors, and method for fabricating the same
US4076379A (en) * 1976-07-26 1978-02-28 United Technologies Corporation Fiber optic connector
GB2049220A (en) * 1979-05-09 1980-12-17 Bunker Ramo Optical fiber terminator and means and method for centering optical fiber
EP0036369A1 (de) * 1980-03-14 1981-09-23 Lignes Telegraphiques Et Telephoniques L.T.T. Verfahren und Vorrichtung zum Verbinden faseroptischer Kabel auf dem Arbeitsplatz

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2122378A (en) * 1982-01-22 1984-01-11 Preformed Line Products Co Splice wedge for holding optical fibers
EP0092441A1 (de) * 1982-04-20 1983-10-26 Raychem Pontoise S.A. Fiberoptische Kabel
FR2587126A1 (fr) * 1985-09-09 1987-03-13 Lignes Telegraph Telephon Dispositif d'eclatement d'un faisceau de fibres optiques en fibres optiques unitaires
FR2588670A1 (fr) * 1985-10-16 1987-04-17 Lignes Telegraph Telephon Tete d'eclatement d'un cable a fibres optiques
EP0225986A1 (de) * 1985-10-16 1987-06-24 Alcatel Cable Aufspleisskopf für faseroptische Kabel
US4737010A (en) * 1985-10-16 1988-04-12 Les Cables De Lyon Spreader head for an optical fiber cable
GB2210472A (en) * 1987-09-30 1989-06-07 British Telecomm Optical fibre package termination assembly
GB2210472B (en) * 1987-09-30 1992-03-18 British Telecomm Termination assembly
EP0330571B1 (de) * 1988-02-23 1993-06-16 AMPHENOL SOCAPEX Société Anonyme Mechanische Haltevorrichtung für optische Kabel mit freier Struktur
US5048918A (en) * 1990-02-07 1991-09-17 Raychem Corporation Optical fiber cable termination
WO1996030987A1 (de) * 1995-03-30 1996-10-03 Klöckner-Moeller Gmbh Detektor für störlichtbögen in schaltanlagen zur verteilung elektrischer energie
AU697914B2 (en) * 1995-03-30 1998-10-22 Klockner-Moeller Gmbh Accidental arc detector for electric power distribution switching equipments
US5940547A (en) * 1995-03-30 1999-08-17 Klockner-Moeller Gmbh Optical fiber accidental arc detector for an electric power distribution switching device

Also Published As

Publication number Publication date
DE3260519D1 (en) 1984-09-13
EP0063506B1 (de) 1984-08-08
US4697873A (en) 1987-10-06
CA1194353A (en) 1985-10-01

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